Linotype-machine.



No. 643,329. Patented Feb. I3, I900.

J. MAcKlBDY.

LINUTYPE MACHINE.

(Application filed Mar. 21, 1888.)

(No Model.) 2 Sheets-Sheet I.

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No. 643,329. Patented Feb. l3, I900. J. MAOKIRDY.

LINOTYPE MACHINE.

(Application filed. Mar. 21, 1898.)

(No Model.) 2 Sheets-Sheet 2.

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WITNESSES rn'rns V Parana tries.

JAMES MAOKIRDY, OF NEW YORK, N. Y., ASSIGNOR TO THE MERGENTIIALERLINOTYPE COMPANY, OF NElV YORK.

LINOTYPE MACHlNE.

SPECIFICATION forming part of Letters Patent No. 643,329, dated February13, 1900.

Application filed March 21, 1898. Serial No. 67 L603. (No model.)

To all whom it may concern.-

Be it known that I, J AMES MACKIRDY, of New York, (Brooklyn,) countyofKings, and State of New York, have invented a new and useful Improvementin Linotype-Machines, of which the following is a specification.

In the Mergenthaler linotype-machine such as represented in LettersPatent of the United States No. 436,532, dated September 16, 1890, thecomposed line of matrices is shifted horizontally into a grooved orchanneled support having a rising-and-falling motion and commonlydenominated the first elevator. The matrix-line is pushed into thiselevator from the left and lowered thereby to the mold,

after which the elevator rises to a level higher,

than that at which it received the matrices, and they are pushed outtoward the right for transference to the distributing mechanism. As theelevator is open at the right-hand side, it is necessary to provide itwith dogs or retaining devices to hold the matrices after theirintroduction and while the elevator is being lowered and raised, andthis in order to prevent the matrices from escaping at the open end. Thedogs, pawls, or retaining devicesheretofore in use have been of acomplicated and delicate character and required to be mechanicallyoperated in order to lock and unlock the end of the matrix-line.

The object of the present invention is to simplify the means forretaining the matrixline within the elevator, avoid the necessity ofcooperating parts, and still admit of the line being shifted right andleft into and out of the elevator without difficulty and with out injuryto the matrix characters.

To this end it consists, broadly, in pawls or dogs applied to theelevator and so formed that they will yield under moderate pressureexerted by the matrices moving in either direction.

I have limited the drawings forming part of this specification to thoseparts which are necessary to a proper understanding of my invention. Inall other respects the machine may be constructed in accordance with thepatent above named or in any other suitable manner. 7

The elevator herein shown corresponds in general construction and modeof operation to the part N in Patent No. 436,532, and the pawls hereinshown are intended as substiceding figure in order to expose the pawlsto view. Fig. 4 is a vertical cross-section on thecorrespondingly-numbered line. Fig. 5 illustrates in side elevation andin top plan view one of my dogs or pawls. Figs. 6 and 7 are horizontalsections on the same level as Fig. 3, showing, respectively, the actionof the outgoing-and incoming matrices.

The elevator N consists simply of a horizontal block or head having avertical slot or opening therethrough from its right end inward asufficient distance to receive a composed line of matrices. Thiselevator is grooved internally to receive the shoulders of the matricesand give them support and is in all respects of ordinary construction,except as to the dogs or pawls 0 forming the subject of the presentinvention.

In the operation of the machine the line of matrices enters the elevatormoving toward the left, as shown in Fig. 6, and as the final operationleave the elevator, moving to the right, as shown in Fig. '7. I dispensewith the ordinary dogs or pawls used in the elevator and substitutetherefor the two horizontal pawls 0 located one on each side. Thesepawls consist each of a piece of spring metal bent at one end, as shownin Fig. 5, to form aprojection, beveled orinclined on both sides. Theyare laid into grooves in the outer sides of the elevator, and theirprojections extend through openings into the interior. They protrudesomewhat beyond the inner vertical walls of the elevator, as shown inthe several figures. As the matrix-line enters, as shown in Fig. 6, itacts between and against the ends of the pawls, which yield and moveoutward, allowing the line to pass between them,

after which they close outside of the line, as shown in Fig. 7, so thatthe matrices are prevented from sliding out and escaping accidentally.When the matrix-line is to be removed, the pressure applied theretocauses the dogs to yield and spring outward, so that the matrices mayescape between them. Thus it will be seen the dogs are openedautomatically by the action of the matrices.

The essentials of my invention reside in the employment of pawls or dogsWhich, although retaining the matrices under ordinary oonditions,willyield Whenever the line is forced strongly against them in eitherdirection.

What I claim as my invention is- 1. As animprovementinlinotype-machines, and in combination with the elevator, matrixretainingdogs or pawls, beveled in both directions, in order that they may yieldbefore the incoming and the outgoing matrices.

2. As an improvement in the Mergenthaler linotype, the elevator groovedin its side 'Walls, in combination With the externally-appresence of twoattesting Witnesses.

JAMES MAoKIRDY. Witnesses:

W. A. MCOALL, W. H. GREELEY.

